Depending on the processed material from each drill must be properly sharpened. To verify the correct angle will help a specially prepared square plate of copper or aluminium with a thickness of 1 mm.
To become operational protractor enough to cut it cut, as shown in the picture: a large cutout at an angle of 120 degrees, the other half is 60 degrees and the surviving corner of a square is 90.
Recommend to read
THE WAY TO “EAST”
In 1955, the Soviet Union took arms ballistic missile R-5, launch weight and range which were respectively 29 tons and 1200 km Mass warhead of about one ton. At start-up to a distance...
DRILL CLEAN!
Someone had to drill holes in the ceiling, he knows, as a way to work from the dust and concrete crumbs. Ways to protect the face exist. One of them use dust cups — often plastic caps...
